A potentially explosive underwater volcano in the Pacific is showing alarming signs of activity. With pressure building and unusual tremors detected, scientists are on high alert. This underwater ...

The 44th episode of lava fountaining on Thursday saw streams ascending over 500 feet above the vent in spectacular color.

An underwater volcano off Tonga erupted on Saturday, triggering tsunami warnings and evacuation orders in Japan and causing ...

An underwater volcano off the Oregon coast could erupt late this year, scientists say. The volcano, known as Axial Seamount, is more than 4,900 feet beneath the Pacific Ocean and 300 miles off the ...